package com.cj.designpattern.observer.Observer;

/**
 * ClassName: Observer <br/>
 * Function: 定义一个抽象观察者 <br/>
 * date: 2018/04/27 14:22 <br/>
 *
 * @author chenj
 * @version 1.0.0
 * @since JDK 1.8
 */
public interface Observer {

    public void update(String message);
}
